/*************************************************************************
	> File Name: 1.class.cpp
	> Author: huguang
	> Mail: hug@haizeix.com
	> Created Time: 
 ************************************************************************/

#include <iostream>
#include <cstdio>
#include <cstdlib>
#include <queue>
#include <stack>
#include <algorithm>
#include <string>
#include <map>
#include <set>
#include <vector>

namespace haizei {

int a, b;

} // end of namespace haizei

namespace haizei {

int c, d;

} // end of namespace haizei

using namespace haizei;

int main() {
    haizei::a = haizei::b = haizei::c = haizei::d = 1;
    std::cout << haizei::a << std::endl;
    a = b = c = d = 2;
    std::cout << haizei::a << std::endl;
    return 0;
}
